A blend of virgin (not recycled) propylene glycol, water and inhibitors.

Physical Properties:

Appearance

Clear, fluorescent yellow colored liquid

Density 22°C (72°F)

1055.40 kg/m³ (65.88 lb/ft³)

Refractive index 22°C (72°F)

1.3903

pH value

9.0-10.7

Reserve Alkalinity (min)

16.0 ml

Viscosity 10°C (50°F)

10.6481mPa·s (10.65 cps)

Boiling point °C @ 101 kPa

106

(°F@ 760 mmHg)

222

Flash point

none

Water content

46 – 50 %

Frost protection °C /°F

-35 / -3

Getting it right is critical in maintaining industry reputation

Modern-day Thermal Solar combo-systems for DHW and Space heating are subject of overheating and stagnation because of low heat demand in summer time. Continuing design improvements of solar collectors sig­nificantly change the requirements to the heat transfer fluids regarding its ability to take thermal stress.

However, stagnation temperatures of up to 400°F (204°C) in flat plate collectors still can be handled by traditionally inhibited solar fluids. In contrast to this, absorber temperatures of up to 550°F (287°C) as reached in vacuum tube collectors require the use of a more ad­vanced fluid containing reversibly vaporizable cor­rosion inhibitors.